2686979 has 2 divisors, whose sum is σ = 2686980. Its totient is φ = 2686978.

The previous prime is 2686973. The next prime is 2686993. The reversal of 2686979 is 9796862.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2686979 is a prime.

It is a super-2 number, since 2×2686979² = 14439712292882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2686973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1343489 + 1343490.

It is an arithmetic number, because the mean of its divisors is an integer number (1343490).

2^2686979 is an apocalyptic number.

2686979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2686979 is an equidigital number, since it uses as much as digits as its factorization.

2686979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The square root of 2686979 is about 1639.2007198632. The cubic root of 2686979 is about 139.0234592843.

The spelling of 2686979 in words is "two million, six hundred eighty-six thousand, nine hundred seventy-nine".